Machine fob baising weights



UNrrED STATES PATENTOFFICE.

SHELDON A. HOTCHKISS, 0F NEW HAVEN, CONNECTICUT. p

MACHINE FOR RAISING WEIGHTS. p

Specication of Letters Patent No. 26,357, dated December 6, 1859'.

` in gearing a drum to an upright shaft, with a screw cut on the surfaceof the shaft, and connecting the drum by means of a pawlhook to a lever,so that by means of the drum and lever operating together increasedpower and facilities are obtained for raising weights; and by means of aknee which is attached to the shaft above the screw and near the lowerend of the outer angle of which a sheave is attached over which the ropeis made to pass, and by the use of the screw, the drum rises as itrevolves,V and by aid of a zone which surrounds the drum and is attachedto the knee, adjusts the coilV of the rope which is attached to theweight.

To enable others skilled in the art to make and use my invention I willproceed to describe its construction and operation.

I make the shaft A, of suitable material, and fiX it firmly to a framework in a perpendicular position. I cut the screw B on the outer surfaceof the shaft, and into this screw, I fix the gear of the drum C, so asto have the drum revolve around the shaft, the screw forming its axis.`The drum I make of any desired diameter and connect it to the neap orlever 1), by means of the pawl-hook E, which I keep in place by means ofthe small spring' a. One end of the pawl-hook is attached to the leverat f, and the other end is forced into the holes b, b, made in the drumnear its lower edge. The shaft forms the fulcrum F of the lever and ismade to move around it. I make the ratchet Gr, and place it around thebottom of the shaft and underneath the lever. I attach thepawl 0, to

the lever and keep it in place by means of v the small spring cZ,`toprevent a1 reverse movement of the lever.`

I afx to` the shaft t above the screw the knee H, having its upper` 3angle project from the shaft a distance equal to the radius of the drum.The other angle" I l falls perpendicularly below the upperedge of thedrum. I attach the sheave K, on

the side of the kneenear the lower end of1 .i the outer angle; and tothe lower end of the t knee, I affix the zone or metal plate J, withAarms extending each way, and curved in`` ward so as to conform to thesurface of the drum for the purpose of keeping the rope in place, and itmay be extended clear around the drum. I attach the rope 1, to one ofthe armsof the drum as shown at S, and pass it through'the groove L,sunk for the purpose in the upper chime of the drum and on to thesheaveand fromthence over"`other f sheaves and gear tothe weight to beraised. n l

I attach to the lever the post M, in an upright position andto `thispost I make fast the brake N, which clasps the drum and i connects withthe hand lever 0.

I operate my machine by applying powerto the lever at. P. `The lever anddrum move togetheraround the same direc-` tion. The drum as it revolvesrises on the screw and takes in the slack rope and ad-" justs the coil.When the weight 1s -raised to 1 the height desired is detached from therope.

I do not claim thescrew, nor the `drurrr` nor the pawl-hook ratchet `andknee separately considered-#but I do c1aim stantially, and for thepurposes set` forth,`

sHELnoN A; HQTcHKrss. p y

Witnesses: t

WILsoN H; CLARK, JOHN C. I-IoLLIsTER.`

The pawl-hook is then withdrawn` Y and the drum uncoils the rope andallows it" The zone J, and the screw, drum, pawl-l hook, knee and sheave1n combination, sub-

